<template>
    <div>
         <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 卡片视图区域 -->
        <el-card>
             <!-- 2为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width: 750px;height:400px;"></div>
        </el-card>
    </div>
</template>
<script>
// 1.导入echarts
import echarts from 'echarts'
import _ from 'lodash'
export default {
    data() {
        return {
            options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
        }
    },
    async mounted() {
         // 3基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        const { data:res } = await this.$http.get('reports/type/1')
        if(res.meta.status!==200){
            return this.$message.error('获取折线图数据失败')
        }

        // 4指定图表的配置项和数据
       const result =_.merge(res.data,this.options)

            // 5使用刚指定的配置项和数据显示图表。
            myChart.setOption(result)
    },
}
</script>
<style lang="less" scoped>
    
</style>